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MILTON I()REhL/rl\i AND JAMES R. MATHEWSON, 0F PHILADELPHIA i PENNSYLVANIA.

Letters .Patent No. 64,414, datefl'jlfay 7, 1867) IMPROVEMENT IN STEAM-PLUMES.

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T O ALL WHOM IT MAY CONCERN:

Be it known that we,'M. FOREMAN and J. R. MATHEWSON, of Philadelphia, Pennsylvania, haveinvented an improved Blowing Apparatus; and we do hereby declare the following to be a'full, clear, and exact description of the same, re'ference being hadto the accompanying drawing and to the letters of reference Vmarked thereon.

Our invention consists of twoor more pipes of different dia-meters, arranged and combined with a steam pipe, as described hereafter, so that a jet of steam may cause a blast of 'air to be discharged from the largest of the pipes, the whole forming a cheap, simple, and durable blowing apparatus.

In order to enable others to make and use our invention, we will now proceed describe its construction and operation, reference being yhad to the accompanying drawing, which forms a part of this specication, and in whichlFigure 1` is an exterior view ofgour improved blowing apparatus; and

Figure 2 a section on the line 1-2, fig. l.

A, A1, Aare three cylindrical pipes of different diameters, each pipe having a flaring flange at one end, as shown'in the drawing. The smallest en d of the pipe A2 projects into the flanged end of the pipe A1, and the opposite end of the latter extends into the flanged end of the largest pipe A, the pipes'being secured together in their proper relative positionsl by any number of'br'aces, a al, `or their equivalents.Y Into the outer end of the pipe A2 projects the nozzle of a steam pipe, E, which is secured to the pipe .A by braces a2 a2. The pipe/A may communicate with the tuye'resot` a forge or furnace, or extend to the space beneath the grate of any fire-place into which it is desired to' introduce a blast of air. When ajet of steam is discharged from the pipe E into the pipeAZ, the air which passes into the latter through its flanged end will be drivenby and carried with the steam into the pipe Al. This air mingling with the steam is heated by contact therewith, and expands and fills the pipe, so that a current of heated air and steam is discharged into the pipe A1, and passes through the latter4 into the pipe A, carrying with it the air which is admitted to the pipe A1, through the annular opening betweenrthe said pipe Al and the pipe A2. The air which passes into the pipe A1 is also heated as it 'min'gles withfthe heated current of air-and steam, and' is' expanded, and in this condition passes into the pipe A, and heats and carries with it the air admitted tothe latter pipethrough the flanged `end of the same. A stre-am of mingled air and steam, moving ata highvelocity, is thus projected into the tuyere pipe or into the hre-place of the furnace.

A blowing apparatus of this description is cheap, simple in its construction, cannot get out of order, and may be readily regulated so as to obtain a blast of any required degree of force. But two pipes, A A1, may be used in connection with the steam tube E, or the number of the pipes may be increased without departing from the main feature of our invention.

We claim as our'invention, and desire to secure by Letters Patenti A steam pipe, E, in lcombination with two or more pipes, A A1, of different diameters, the whole being `arranged and operating substantially as described.

In testimony whereof wehave signed our' names to this specification in the presence of two'subscribing witnesses.

MILTON FOREMAN,

JAMES s. MATHEWsoN. Witnesses: l

CHARLES E. FOSTER, W. J. R. DELANY. 

